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Multi-Digit Operations

Grade 4 · Mathematics · Worksheet 1

  1. A rectangular garden is drawn on a grid. The garden has a length of 12 meters and a width of 8 meters. What is the area of the garden in square meters?
    Answer: ______________
  2. 2,847 - 1,593 = ? Answer: ______________
  3. A rectangular park is drawn on a grid where each square represents 1 square meter. The park has a length of 125 meters and a width of 93 meters. A rectangular sandpit in one corner measures 17 meters by 11 meters. What is the area of the park that is not covered by the sandpit?
    Answer: ______________
  4. Emma is planning a school field trip to the science museum. There are 128 students in fourth grade and 142 students in fifth grade going on the trip. The museum requires 1 adult chaperone for every 10 students. How many adult chaperones are needed in total? Answer: ______________
  5. At the school book fair, Moana bought a book about space for 2637 points and a book about dinosaurs for 2788 points. How many total points did Moana spend at the book fair? Answer: ______________
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Answer Key & Explanations

Multi-Digit Operations · Grade 4 · Worksheet 1

  1. A rectangular garden is drawn on a grid. The garden has a length of 12 meters and a width of 8 meters. What is the area of the garden in square meters? Answer: 96 Solution: To find the area of a rectangle, we multiply its length by its width. Identify the given measurements. The length of the garden is 12 meters.
    Full step-by-step solution

    To find the area of a rectangle, we multiply its length by its width. Step 1: Identify the given measurements. The length of the garden is 12 meters. The width of the garden is 8 meters. Step 2: Write the formula for the area of a rectangle. Area = length × width Step 3: Substitute the given numbers into the formula. Area = 12 × 8 Step 4: Perform the multiplication. 12 × 8 = 96 Step 5: State the final answer with the correct units. Since the length and width are in meters, the area is in square meters. Therefore, the area of the garden is 96 square meters.

  2. 2,847 - 1,593 = ? Answer: 1254 Solution: Write the numbers vertically aligned by place value: 2,847 - 1,593 Subtract the ones column: 7 - 3 = 4 Subtract the tens column: 4 - 9 (we need to regroup) Borrow 1 hundred from the hundreds column (8 becomes 7) Add 10 tens to the tens column (4 becomes 14) 14 - 9 = 5 Subtract the hundreds…
    Full step-by-step solution

    Step 1: Write the numbers vertically aligned by place value: 2,847 - 1,593 Step 2: Subtract the ones column: 7 - 3 = 4 Step 3: Subtract the tens column: 4 - 9 (we need to regroup) Borrow 1 hundred from the hundreds column (8 becomes 7) Add 10 tens to the tens column (4 becomes 14) 14 - 9 = 5 Step 4: Subtract the hundreds column: 7 - 5 = 2 Step 5: Subtract the thousands column: 2 - 1 = 1 Step 6: Combine the results: 1,254 The answer is 1,254.

  3. A rectangular park is drawn on a grid where each square represents 1 square meter. The park has a length of 125 meters and a width of 93 meters. A rectangular sandpit in one corner measures 17 meters by 11 meters. What is the area of the park that is not covered by the sandpit? Answer: 11438 Solution: Find the area of the entire park. Area = length × width = 125 × 93 = 11,625 square meters. Find the area of the sandpit.
    Full step-by-step solution

    Step 1: Find the area of the entire park. Area = length × width = 125 × 93 = 11,625 square meters. Step 2: Find the area of the sandpit. Area = length × width = 17 × 11 = 187 square meters. Step 3: Subtract the sandpit area from the total park area: 11,625 − 187 = 11,438 square meters. The answer is 11,438.

  4. Emma is planning a school field trip to the science museum. There are 128 students in fourth grade and 142 students in fifth grade going on the trip. The museum requires 1 adult chaperone for every 10 students. How many adult chaperones are needed in total? Answer: 27 Solution: Find the total number of students going on the field trip. 128 fourth graders + 142 fifth graders = 270 students Calculate how many adult chaperones are needed.
    Full step-by-step solution

    Step 1: Find the total number of students going on the field trip. 128 fourth graders + 142 fifth graders = 270 students Step 2: Calculate how many adult chaperones are needed. Since 1 adult is required for every 10 students, divide the total number of students by 10. 270 ÷ 10 = 27 Step 3: Since we can't have a fraction of an adult, and 270 divided by 10 gives exactly 27, we need 27 adult chaperones. The answer is 27.

  5. At the school book fair, Moana bought a book about space for 2637 points and a book about dinosaurs for 2788 points. How many total points did Moana spend at the book fair? Answer: 5425 Solution: Identify the cost of the space book: 2637 points. Identify the cost of the dinosaur book: 2788 points. Add them together: 2637 + 2788 = 5425.
    Full step-by-step solution

    Step 1: Identify the cost of the space book: 2637 points. Step 2: Identify the cost of the dinosaur book: 2788 points. Step 3: Add them together: 2637 + 2788 = 5425. Moana spent a total of 5425 points at the book fair.